Method of Craniomaxillofacial Superimposition by Six-Degrees-of-Freedom Search

概要

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Assessing changes in skeletal morphology with orthognathic surgery and postoperative stability is crucial for the proper treatment of patients with dentofacial deformity. To date, two-dimensional cephalometric analysis has been used in most cases, but three-dimensional CT images have recently started to be used for assessing the treatment of jaw deformities. However, three-dimensional analysis is not used generally because of the difficulty of establishing superimposition of three-dimensional CT images.In this study, a definition of the coordinate system in three-dimensional assessment was proposed and a six-degrees-of-freedom search was used for clinical images. As a result, postoperative CT images were successfully superimposed, and the proposed method enabled three-dimensional evaluation of skeletal morphology.